<?php
    // create short variable names
    $tireqty = $_POST['tireqty'];
    $oilqty = $_POST['oilqty'];
    $sparkqty = $_POST['sparkqty'];
    $address = $_POST['address'];
    $DOCUMENT_ROOT = $_SERVER['DOCUMENT_ROOT'];
    $date = date('H:i, jS F Y');
?>
<html>
<head>
    <title>Bob's Auto Parts - Order Results</title>
</head>
<body>
<h1>Bob's Auto Parts</h1>
<h2>Order Results</h2>
<?php
echo "<p>Order processed at ".date('H:i, jS F Y')."</p>";


echo '<p>Your order is as follows:</p>';

$totalqty = 0;
$totalqty = $tireqty + $oilqty + $sparkqty;
echo "Item orderd: ".$totalqty."<br/>";

if ($totalqty == 0) {
    echo "You did not order anything on the previous page!<br/>";
} else {
    if ($tireqty > 0) {
        echo $tireqty.' tires<br/>';
    }
    if ($oilqty > 0) {
        echo $oilqty.' bottles of oil<br/>';
    }
    if ($sparkqty > 0) {
        echo $sparkqty.' spark plugs<br/>';
    }
}

$totalamount = 0.00;

define('TIREPRICE', 100);
define('OILPRICE', 10);
define('SPARKPRICE', 4);

$totalamount = $tireqty * TIREPRICE
    + $oilqty * OILPRICE
    + $sparkqty * SPARKPRICE;

$totalamount = number_format($totalamount, 2, '.', '');

echo "<p>Total of order is $".$totalamount."</p>";
echo "<p>Address to ship to is ".$address."</p>";

$outputstring = $date."\t".$tireqty." tires \t".$oilqty." oil\t".$sparkqty
                ." spark plugs\t\$".$totalamount."\t".$address."\n";

echo "Subtotal: $".number_format($totalamount, 2)."<br/>";
// open file for appending
@ $fp = fopen("$DOCUMENT_ROOT/chapter02/orders/orders.txt", 'ab');

flock($fp, LOCK_EX);

if (!$fp) {
    echo "<p><strong> Your order could not be processed at this time.
          Please try again later.</strong></p></body></hitm>";
    exit;
}

fwrite($fp, $outputstring, strlen($outputstring));
flock($fp, LOCK_UN);
fclose($fp);

echo "<p>Order written.</p>";
?>
</body>
</html>
